john harbaugh versus jim harbaugh in the super bowl. it is the stuff t-v stories are made of. put yourself in their place. could you destroy your brother's career dream for your own? carol costello has more on the match-up. and some vintage footage of the harbaugh family. >> the brothers are living the dream. and only one will make be the winner. >> we fight for everything, we fight for the extra hot dog, girls, everything. >> we both have our girlfriend. and what we both have the same parents. but we have a less than half the coaching experience is that he does. >> they seem so cool and detached but there sibling rivalry dates back decades. >> with this was founded our cnn and archives. >> there would not even pose for a quarterback photograph. >> and i was supposed to be the football quarterback but i was beat out by a sophomore, that was my brother. >> on the loudspeaker over, it was harbaugh tossed to harbaugh and mii thought what a great thanks to here. >> the high school gridiron is one of the thing but the super bowl is much different. >> coach your brother says that yo